Fix ppc64 single step over atomic sequence testcase.

The current ppc64 single step over atomic sequence testcase is written
in C and breaks with some versions of gcc. Convert the test to
assembly and use stepi to step through it.

gdb/testsuite/
2014-04-01  Anton Blanchard  <anton@samba.org>

	* gdb.arch/ppc64-atomic-inst.c: Remove.
	* gdb.arch/ppc64-atomic-inst.S: New file.
	* gdb.arch/ppc64-atomic-inst.exp: Adapt for asm based testcase.
This commit is contained in:
Anton Blanchard 2014-03-28 12:37:37 +11:00
parent 11a865c84f
commit 62f7182c14
4 changed files with 78 additions and 48 deletions

View File

@ -1,3 +1,9 @@
2014-04-01 Anton Blanchard <anton@samba.org>
* gdb.arch/ppc64-atomic-inst.c: Remove.
* gdb.arch/ppc64-atomic-inst.S: New file.
* gdb.arch/ppc64-atomic-inst.exp: Adapt for asm based testcase.
2014-03-31 Doug Evans <dje@google.com>
* gdb.base/print-symbol-loading-lib.c: New file.

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@ -0,0 +1,61 @@
/* This file is part of GDB, the GNU debugger.
Copyright 2008-2014 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
.align 2
.globl main
#if _CALL_ELF == 2
.type main,@function
main:
#else
.section ".opd","aw"
.align 3
main:
.quad .main,.TOC.@tocbase,0
.size main,.-main
.previous
.globl .main
.type .main,@function
.main:
#endif
li 0,0
addi 4,1,-8
stw 0,0(4)
1: lwarx 5,0,4
cmpwi 5,0
bne 2f
addi 5,5,1
stwcx. 5,0,4
bne 1b
std 0,0(4)
2: ldarx 5,0,4
cmpdi 5,0
bne 3f
addi 5,5,1
stdcx. 5,0,4
bne 1b
3: li 3,0
blr
#if _CALL_ELF == 2
.size main,.-main
#else
.size .main,.-.main
#endif

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@ -1,44 +0,0 @@
/* This file is part of GDB, the GNU debugger.
Copyright 2008-2014 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <stdio.h>
int main()
{
unsigned int word = 0;
unsigned int *word_addr = &word;
unsigned long dword = 0;
unsigned long *dword_addr = &dword;
__asm __volatile ("1: lwarx %0,0,%2\n" \
" addi %0,%0,1\n" \
" stwcx. %0,0,%2\n" \
" bne- 1b" \
: "=&b" (word), "=m" (*word_addr) \
: "b" (word_addr), "m" (*word_addr) \
: "cr0", "memory"); \
__asm __volatile ("1: ldarx %0,0,%2\n" \
" addi %0,%0,1\n" \
" stdcx. %0,0,%2\n" \
" bne- 1b" \
: "=&b" (dword), "=m" (*dword_addr) \
: "b" (dword_addr), "m" (*dword_addr) \
: "cr0", "memory"); \
return 0;
}

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@ -27,7 +27,7 @@ if {![istarget "powerpc*"] || ![is_lp64_target]} {
}
set testfile "ppc64-atomic-inst"
set srcfile ${testfile}.c
set srcfile ${testfile}.S
set binfile ${objdir}/${subdir}/${testfile}
set compile_flags {debug quiet}
@ -50,11 +50,18 @@ set bp1 [gdb_get_line_number "lwarx"]
gdb_breakpoint "$bp1" "Breakpoint $decimal at $hex" \
"Set the breakpoint at the start of the sequence"
set bp2 [gdb_get_line_number "ldarx"]
gdb_breakpoint "$bp2" "Breakpoint $decimal at $hex" \
"Set the breakpoint at the start of the sequence"
gdb_test continue "Continuing.*Breakpoint $decimal.*" \
"Continue until breakpoint"
gdb_test next ".*__asm __volatile.*" \
gdb_test nexti "bne.*1b" \
"Step through the lwarx/stwcx sequence"
gdb_test next ".*return 0.*" \
"Step through the ldarx/stdcx sequence"
gdb_test continue "Continuing.*Breakpoint $decimal.*" \
"Continue until breakpoint"
gdb_test nexti "bne.*1b" \
"Step through the lwarx/stwcx sequence"